Valve actuating mechanism for internal combustion engines

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(11)

EP 0 459 539 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	04.03.1992 Bulletin 1992/10

(43)	Date of publication A2:
	04.12.1991 Bulletin 1991/49

(21)	Application number: 91113802.2

(22)	Date of filing: 14.03.1989

(51)	International Patent Classification (IPC)⁵: F01L 1/08, F01L 1/18, F01L 1/16

(84)	Designated Contracting States:
	DE FR GB

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Priority:

18.03.1988 JP 65319/88
18.03.1988 JP 65325/88

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	89302463.8 / 0333416

(71)	Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
	Minato-ku, Tokyo (JP)

(72)	Inventors:
	Sanada, Makoto Wako-shi, Saitama-ken (JP) Yamashita, Hiroshi Wako-shi, Saitama-ken (JP) Izawa, Shinichiro Wako-shi, Saitama-ken (JP) Hamamoto, Toshikazu Wako-shi, Saitama-ken (JP)

(74)	Representative: Piesold, Alexander J. et al
	Frank B. Dehn & Co. Imperial House 15-19 Kingsway London WC2B 6UZ London WC2B 6UZ (GB)

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References cited: :


	Remarks:
	This application was filed on 17.08.1991 as a divisional application to the application mentioned under INID code 60.

(54)	Valve actuating mechanism for internal combustion engines

(57) A valve actuating mechanism for an internal combustion engine has a rotatable cam which has its camming surface (12)disposed to slide on a cam slipper surface (14) of a rocker arm to thereby open and close an intake valve (or exhaust valve) of the engine by rocking motion of the rocker arm. The dimensions, shapes, and relative positions of the rotatable cam and the rocker arm are so designed as to safisfy a condition of V_C + V_F > 0, where V_C represents the velocity of movement of a contact point on the camming surface at which the camming surface slides on the cam slipper surface, and V_F the velocity of movement of the contact point on the cam slipper surface at which the cam slipper surface slides on the camming surface.

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